Device for precipitating and drawing off annoying and harmful vapors and gases developing during boiling of acids



G. DEIBEL 7 2,533,561

RAWING OFF ANNOYING AND HARMFUL VAPORS AND GASES DEVELOPING Dec. 12, 1950 DEVICE FOR PRECIPITATING AND D DURING BOILING OF ACIDS Filed Sept. 17, 1949 INVENTOR Gozgfried'flez'bel BY I 40m Mm! ATTORNEYS Patented Dec. 12, 1950 DEVICE FOR PRECIPITATING AND DRAW- ING OFF ANNOYING AND HARMFUL VAPORS AND GASES DEVELOPING DUR- ING BOILING OF ACIDS Gottfried Deibel, Dresden, Germany Application September 17, 1949, Serial No. 116,231 In France March 15, 1948 4 Claims.

This invention relates to a device for precipitating and drawing off annoying and harmful vapors and gases, the device having the form of a hell or hood provided with an outlet pipe. In one of the known devices of this class a suitable bottom is interposed between the hood, which preferably is of acid-proof material, and a support therefore. 7

This intermediate bottom is fitted with an opening in such a way that the condensation water collecting and running down during digestion' on the walls of the totally closed device is guided to the intermediate bottom and thence through the opening into the support formed and acting as receiver, the intermediate bottom sloping on all sides towards the opening arranged in the center.

Another known feature of this device is the provision of an additional intermediate bottom firmly or interchangeably arranged above the discharging bottom. This additional bottom has a horizontal surface possessing perforations and a central hole and is further fitted with draining grooves which are inclined towards the center and guide the condensate to the central hole mentioned. j

The object of the invention is an improvement and further development of this known device.

It has been found in operation that an excessive amount of waste is produced during firing if the intermediate bottom and the bell or hood of acid-proof ceramic material are made in one piece. This is due to the fact that the intermediate bottom is relatively weak compared with the mass of the bell or hood and therefore unable to endure the stresses developing in firing.

Even if the intermediate bottom is made as an independent unit while retaining its funnelshaped form, the wall thicknesses of the resulting profile will lack uniformity to such an extent that they are not equal to the stresses occurring during firing.

Compared with the known device, the invention consists in constructing the intermediate bottom itself as a solid plate constructionally separated from the hood or hell and in dispensing with the discharging bottom having a horizontal surface and hitherto placed on the intermediate bottom. The intermediate bottom according to the invention made as a solid plate has a horizontal surface and is provided with draining grooves sloping towards a central hole.

The plate thus formed is placed within the bell or hood on supporting ledges provided on the walls and secured by using acid-proof refractory cement to prevent the condensate from passing to the lower space of the bell or hood.

To make sure that the condensate runs down from the walls and into the receiver draining ledges are arranged immediately above the edges of the discharge plate. These ledges are fixed in grooves of the side walls by means of acidproof refractory cement, and the condensate drops from them on to the discharge plate.

This plate, however, serves not merely for catching the condensate running off from the Walls of the casing, since dangerous and poisonous liquids passing to the plate when they boil over or are accidentally spilled are guided through the grooves of the intermediate bottom to the central opening and thence into thereceiver. The arrangement is therefore such as to make sure that all liquids spilled or boiled over pass into the receiver.

In this way a plurality of burners and reagent dishes may be placed on the plane surface of the discharge bottom while simultaneously and in the same device a number of different decocting processes are carried out.

The device is so constructed, moreover, that the base, the receiver, the door frame and the top closure each consist of a single piece, and on the other hand the walls of the device are assembled from individual plates made of fire-and acidproof material, the entire structure being held together at the corners by means of a strip with or without legs for setting up the device.

In case of smaller devices the bell or hood with all its parts may be made in one piece without causing too great losses during firing. If, however, devices are concerned which are intended for larger plants and require corresponding dimensions, the whole structure cannot be made any more in one single piece from ceramic material. Here the invention will be found helpful according to which the walls of the device may be combined from single plates.

Another feature of the invention is that the outlet or discharge pipe may be connected with a multiple-part branch member to permit the connection of several precipitating and drawing oif devices to one and the same outlet pipe.

The invention is illustrated by way of example in the accompanying drawing, in which Figure 1 is an elevation partly in vertical cross section;

Fig. 2, a top view of an intermediate bottom; and

Fig. 3, an enlarged sectional view of the point where the intermediate bottom rests on the ledge.

The casing I with the upper funnel-shaped hood closure 2 is made in one piece or composed of individual plates made of acid-proof refractory material, the device is provided on top with an outlet pipe 3 and in the base A with a receiver 5 for the condensate. 6 is'a sliding door made of glass or similar transparent material for watching the boiling process going on inside precipitated and running .ioff'irom the innerwalls of the device to the receiver 5 a discharge.

plate or bottom I0 is provided above this re.-

ceiver. The bottom l0 consists of a solid piece of ceramic material of corresponding strength, but may comprise also several parts. The bottom l0 rests on the dogs or lugs H and is united with them by acid-proof and refractory cementing or it may be inserted in notches on the inher wall of the device and sealed. Immediately above the edges of the bottom the cemented draining ledges 12 are located to make sure that the condensate drops from the inner walls on to the discharge bottom Hi. In the bottom iii a draining hole 13 is disposed. From the edges of the plate having a perfectly plane surface id draining channels I5, Pislope on all sides towards the opening 13 and guide the condensate into the receiver 5. The channels thus are -of progressively greater depth from the perimeter of the plate toward the center and the bottoms of the channels extend along the respective sides of the generally pyram dal lower face of discharge bottom I0.

- Inor'der to prevent objects from dropping from the space above the intermediate bottom into the lower space 4 of the receiver 5 the draining hole i3 is covered by a detachable screen 1?. In this Way a plurality of burners Tand associated basins [8 can be placed on the plane-surface of the plate it} without requiring the formerly usediunnel-shaped intermediate bottom and the discharge bottom arranged thereon.

Iclaim: l. A device for precipitating and drawing off annoying and harmful vapors and gases de veloped during boiling of acids and the like, said device comprising a casing having a discharge plate therein adjacent the bottom thereof and spaced from said bottom and having a hood at the top thereof, said hood having an outlet pipe affixed thereto, said discharge plate having a horizontaltop plane surface with a central discharge opening therein, and having a plurality er draining channels in the top surface thereof,

said channels sloping downwardly from the outer'periphery of said discharge plate to said discharge opening'and being in communication therewith, and a receiver beneath said discharge plate beneath said discharge opening therein for the condensates precipitating and running down the inner wall of said hood and the drainmg channels in said discharge plate.

2.. The combination set forth in claim 1 in which a draining ledge is anixed to the wall of said casing and extends inwardly therefrom over the periphery of said discharge plate.

3. The combination set forth in claim 1 which the discharge opening in said discharge plate is covered by a screen.

device of the character described dom'pris-i ing a casing having lateral walls and having a discharge plate the-rein adjacent the bottom there oi and spaced from said bottom, with its entire REFERENCES CITED The following references are of record in the file of this patent;

; UNITED STATES PATENTS j Number v Name Date 11 23 ,763; Lamb Jan. 5, 1915 1,396,584 K'ukulka Nov. 8, 1 21- 1501011 Wolf Feb. 21, 1922 2,935,297 a Deibel June 29, 937 

